A spacecraft traveling through the solar system's main asteroid belt, which lies between Mars and Jupiter, transmitted images of two asteroids, Iole and Thetis, Thetis has significantly more impact craters--marks left by collisions with neighboring asteroids--than does Iole. Hence, Thetis is significantly older than Iole. Which of the following, if true, provides the most support for the argument? (A) Not all impact craters such as those found on Thetis and Iole are of the same depth and shape. (B) Many asteroids that have been identified by the images transmitted by spacecraft are not located in the parts of the solar system's main asteroid belt in which Iole and Thetis are located. (C) The asteroids that make up the solar system's main asteroid belt are not as old as either Mars or Jupiter. (D) Both Thetis and Iole are of a type of asteroid that is formed when a collision breaks up a larger asteroid. (E) The asteroids in the part of the asteroid belt where Iole is located are more likely to collide with each other than are those in the part of the belt where Thetis is located. 这题我觉得五个选项都无法支持这篇短文的论点阿 为什麽(E)可以支持呢? 谢谢 ----------------------------------------------------------------------------- The crustacean known as harpacticoida are very widespread in marine sediments, where they feed on microorganisms by ingesting the sediment particles to which the microorganism adhere. Heavy metals, such as those found in industrial pollution, readily adhere to sediment particles. Harpacticoids are poisoned by heavy metals but are unaffected by most other pollutants. Therefore the concentration of harpacticoids in an area is a good indication of whether that marine environment contains heavy metals. Which of following is an assumption on which the argument relies? (A) Industrial pollution is the principal source of heavy metals in marine sediments. (B) Harpacticoids are the only crustaceans that feed on microorganisms by ingesting sediment particles. (C) Harpacticoids are more susceptible to poisoning by heavy metals than are other marine organisms. (D) The microorganisms that harpacticoids feed on are not killed by pollutants that are harmless to harpacticoids. (E)The microorganisms that harpacticoids feed on absord heavy metals. 这题一样不懂为何(D)是答案 麻烦高手解惑了 谢谢 --

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